Search the Office of Financial Aid comprehensive database of scholarships administered by the university through AcademicWorks. Click on the top right "Sign in" button to submit your student information and learn about scholarships for which you are eligible.
Check with your college and department for scholarships they sponsor not listed elsewhere.
Michigan State University Library maintains a comprehensive database of Grants for Individuals. Many of these are fellowships, and some are only for Michigan State students. But overall, it’s a great resource.
CUNY also offers a comprehensive Scholarships Database; some of the opportunities it lists are restricted to local students, but most are for students throughout the country.